Yeah if your DPS aren’t confirming kills then a switch to Bap often tips the balance. You can hold an angle and do the extra damage required against someone who isn’t looking at you. And the reason why they weren’t looking at you is because your DPS were almost doing enough by themselves. Certainly they were doing enough by themselves to grab some space and attention from the enemy.
Or you can do what most support players do which is play Mercy, healbot the tank and make snidey comments about the DPS.